Extract component to render dashboard polls

Just like we usually do when reorganizing code.

app/components/dashboard/polls_component.html.erb

@@ -0,0 +1,5 @@
+<div class="row expanded margin-top" data-equalizer="poll-cards" data-equalize-on="medium">
+  <% polls.each do |poll| %>
+    <%= render Dashboard::PollComponent.new(poll) %>
+  <% end %>
+</div>

app/components/dashboard/polls_component.rb

@@ -0,0 +1,11 @@
+class Dashboard::PollsComponent < ApplicationComponent
+  attr_reader :polls
+
+  def initialize(polls)
+    @polls = polls
+  end
+
+  def render?
+    polls.any?
+  end
+end